Home / 2,159.55-2,980.19-1,215.25

Finding the Fourth Proportional to 2,159.55, 2,980.19 and 1,215.25

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Solution

The fourth proportional to 2,159.55, 2,980.19 and 1,215.25 is: 1,677.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.55 : 2,980.19 = 1,215.25 : x
  2. Step 2: Convert to fraction form
    2,159.55/2,980.19 = 1,215.25/x
  3. Step 3: Cross multiply
    2,159.55x = 2,980.19 × 1,215.25
  4. Step 4: Simplify right side
    2,159.55x = 3,621,675.90
  5. Step 5: Solve for x
    x = 3,621,675.90/2,159.55
  6. Step 6: Final answer
    x = 1,677.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.